1.of the following pure susbances,which has the highest melting point?AS8 B.I2 C.SiO2 D.SO2 E.C6H62.In the electroplating of nickle,0.2 faraday of electrical charge is passes through a solution of NiSO4.What mass of nickle is deposited?A.2.94g B.5.87
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1.of the following pure susbances,which has the highest melting point?
AS8 B.I2 C.SiO2 D.SO2 E.C6H6
2.In the electroplating of nickle,0.2 faraday of electrical charge is passes through a solution of NiSO4.What mass of nickle is deposited?
A.2.94g B.5.87g C.11.7g D.58.7g E.294g
1.C 以下选项哪个熔点最高?
熔点:S 119.0 I 113.5 SiO21670/1710(鳞石英/方石英) SO2
1.熔点最高的当然是SiO2
2.硫酸镍失去0.2mol电子,刚好是0.1mol的镍,所以是58.7*0.1=5.87g
C
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